Re: Cayenne and Spring (a Hibernate inspired question)

From: Michael Gentry (blacknex..mail.com)
Date: Wed Feb 27 2008 - 10:15:49 EST

  • Next message: Razumovsky Andrey: "Re[3]: ROP: validation and callbacks"

    When I used Cayenne with a Tapestry application, I stored a
    DataContext off in the session (so it was persistent across
    request/response loops) and I could use it to handle objects I needed
    to track from page-to-page (or even to the same page, but in a
    different request/response loop). This is what you are talking about,
    I think, with "long-running session." The only trickery I had to do
    was tell Tapestry to stop serializing my Cayenne objects into the HTML
    because on the next request/response loop, Tapestry would deserialize
    those objects and you'd have a Cayenne object not attached to the
    original DataContext. Once I told Tapestry to leave Cayenne alone, it
    worked much better for me.

    Robert Ziegler showed how you can add sort orderings to your query.

    /dev/mrg

    On Tue, Feb 26, 2008 at 7:13 AM, Marek Wawrzyczny
    <marek_wawrzyczn..nternode.on.net> wrote:
    > Hi,
    >
    > It has been a while since I last used Cayenne and that was within a Swing ROP
    > context.
    >
    > More recently I have been involved in writing a Spring MVC/Hibernate
    > application. The experience has only made me fonder for Cayenne and now it
    > appears that the team I'm in may consider ORM alternatives.
    >
    > My application is relatively simple CRUD application with the exception of one
    > set of two screens, where all data entry culminates in a parent/child
    > interface (using Spring's AbstractWizardFormController ).
    >
    > The object graph can become somewhat complex, combining objects from about 10
    > different entities. The pages ideally would require a long-running session,
    > or rather a ObjectContext spanning several requests.
    >
    > I'm curious as to how well does Cayenne handle these types of interfaces in
    > web applications.
    >
    > The other problem we're currently having is sorting across multiple
    > relationships.
    >
    > I'm curious as to other people's experiences in this area. I would love to be
    > able to convince the team to move to Cayenne if the framework fits the bill.
    >
    >
    > Kind regards,
    >
    > Marek Wawrzyczny
    >

    This archive was generated by hypermail 2.0.0 : Wed Feb 27 2008 - 10:16:21 EST